StackAdapt is the leading technology company that empowers marketers to reach, engage, and convert audiences with precision. With 465 billion automated optimizations per second, the AI-powered StackAdapt Marketing Platform seamlessly connects brand and performance marketing to drive measurable results across the entire customer journey. The most forward-thinking marketers choose StackAdapt to orchestrate high-impact campaigns across programmatic advertising and marketing channels.

As a Senior Manager, HR Business Partner, you will lead a global team and serve as a strategic HR partner to senior leaders across our global revenue organization, driving people strategy, organizational effectiveness, and talent development in alignment with StackAdapt's company objectives. This is a high-impact leadership role within the People & Culture team, requiring deep expertise in employee relations, org design, and change management at scale.

You will collaborate closely with leaders across Finance, Legal, and other G&A functions, as well as cross-functional partners in Talent Acquisition, Total Rewards, People Operations, and Learning & Development to deliver integrated people programs. This role reports to the Director, People Business Partners.

StackAdapt is a Remote First company, we are open to candidates located anywhere in Canada for this position.

What You'll Be Doing:

• Partner with senior business leaders to design and execute people strategies that drive organizational effectiveness, talent retention, and high-performance culture.
• Lead complex employee relations investigations and resolution processes, applying sound judgment and ensuring legal compliance across Canadian and global jurisdictions.
• Lead a team of global People Business Partners while partnering with senior business leaders to design and execute people strategies that drive organizational effectiveness, talent retention, and high-performance culture.
• Consult on org design, workforce planning, and restructuring initiatives, providing data-informed recommendations to business and People leadership.
• Coach and develop people managers on leadership effectiveness, performance management, and team engagement.
• Collaborate with Centers of Excellence (Talent Acquisition, Total Rewards, L&D, People Ops) to deliver integrated HR programs aligned to business priorities.
• In your first six months, you will focus on building trusted relationships with your assigned business unit leaders, conducting a landscape assessment of current people priorities and talent gaps, and completing at least one end-to-end org design or workforce planning initiative. You will also lead employee relations cases independently, support a performance cycle, and co-develop a people roadmap for your client groups aligned to StackAdapt's 2026 company objectives.
• Employee relations: Resolve 90%+ of ER cases within agreed SLA timelines.
• Org design: Deliver at least one documented org design or workforce planning project within the first 6 months.
• Manager capability: Demonstrate measurable improvement in manager effectiveness scores in assigned client groups within 12 months.
• Retention: Contribute to a regrettable attrition rate at or below team target for assigned business units.

What You'll Bring to the Table

• 7+ years of progressive HR Business Partner experience, including at least 3 years in a senior or lead HRBP role supporting complex, fast-paced organizations.
• Demonstrated experience leading org design, workforce planning, and change management initiatives at scale.
• Deep expertise in Canadian employment law and employee relations practices across multiple provinces; global employment law knowledge is a valuable asset.
• Proven ability to build trusted advisory relationships with VP and C-suite leaders, influencing decisions through data, business acumen, and credibility.
• Track record of coaching and developing managers and teams to elevate leadership capability and engagement.